[특허]Packages embodying a controlled peel seal and method of preparing same

[미국특허] Packages embodying a controlled peel seal and method of preparing same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-027/08 B65D-073/00
출원번호	US-0615654 (1975-09-22)
발명자 / 주소	Romesberg Floyd E. (Midland MI) Goff Frank V. (Midland MI)
출원인 / 주소	The Dow Chemical Company (Midland MI 02)
인용정보	피인용 횟수 : 35 인용 특허 : 1

초록 ▼

Heat seals of closely controlled peel strengths are obtained utilizing a heat seal layer comprising essentially a blend of an ethylene vinyl acetate copolymer and a high density ethylene homopolymer, wherein a sealing temperature is employed adapted to activate the copolymer to seal, but insufficient to activate the homopolymer. Film packages prepared according to the invention may embody an easy opening peel seal achieved by sealing in the above-defined temperature range, and much stronger seals in other areas of the package achieved using the same heat seal layer, but a higher sealing temperature generally nearer the crystalline melting point of the homopolymer constituent.

대표청구항 ▼

A method for forming peel seals comprising the steps of utilizing therefor a film comprising at least a two layered laminar structure embodying a polymeric film substrate layer having intimately adhered to one surface thereof a heat seal layer, the heat seal layer comprising essentially a blend of not less than about 10 and up to about 55 parts by weight of an ethylene homopolymer having a density of between about 0.93 to 0.98 gm/cc, and not less than about 45 and up to about 60 parts by weight of a copolymer of from about 65 to 85 weight percent ethylene and from about 15 to 35 weight percent vinyl acetate, bringing opposed portions of the film into contact under pressure with the heat seal layer of such portions positioned in face to face contact, and applying a controlled sealing temperature of the copolymer constituent, but less than the crystalline melting point of the homopolymer constituent to effect a seal strength between said opposed portions of about 1 pound per linear inch in strength or less. A package comprising a flexible package fabricated at least in part from a flexible film comprising at least two layers in intimately adhered laminar form, including a polymeric film substrate layer having intimately adhered to one surface thereof a heat seal layer prepared from a homogeneous blend comprising essentially not less than about 10 and not greater than about 55 parts by weight of an ethylene homopolymer having a density of from between about 0.93 to about 0.98 gms/cc, and not less than about 45 and not greater than about 60 parts by weight of a copolymer of from about 65 to 85 weight percent ethylene and from about 15 to 35 weight percent vinyl acetate, opposed portions of such film being joined by a pressure and heat induced seal utilizing the heat seal layer of each such portion, said seal being characterized by a peel strength in the range from between about 0.1 and about 1.0 pound per linear inch.

이 특허에 인용된 특허 (1) 인용/피인용 타임라인 분석

Cook Stephen O. (Mill Valley CA), Flexible packaging films of high density polyethylene capable of forming easily openable heatseals.
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이 특허를 인용한 특허 (35) 인용/피인용 타임라인 분석

Schulz Werner,DKX, Bag of a flexible packing material and a method of manufacture thereof.
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Freedman Melvin S. (Beachwood OH), Coextruded core laminates.
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Cooper Barry A. (Wayzata MN), Composite stretch wrap film.
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Busche David A. (Neenah WI) Bostian David H. (Sheboygan WI), Easy open package.
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Busche David A. ; Bostian David H., Easy open package.
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Lulham Cedric M. (Gray Court SC) Wofford George D. (Woodruff SC) Bradfute John G. (Greer SC) Friedrich Steven G. (Greer SC), Easy open shrinkable laminate.
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Sperko William A. ; Turner Robert E. ; Smith Steven L. ; Ray William B., Flexible medical container with selectively enlargeable compartments and method for making same.
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Sperko, William A.; Turner, Robert E.; Smith, Steven L.; Ray, William B., Flexible medical container with selectively enlargeable compartments and method for making same.
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William A. Sperko ; Robert E. Turner ; Steven L. Smith ; William B. Ray, Flexible medical container with selectively enlargeable compartments and method for making same.
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Smith, Steven L.; Barney, Ward; Gharbian, Noel; Harvey, Douglas G.; Mclonis, Mark R.; Peara, Christopher D.; Pool, Scott L.; Sacca, Giuseppe; Sakaguchi, Thomas R.; Sandberg, Sharilyn J.; Walter, Will, Flexible multi-compartment container with peelable seals and method for making same.
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Smith,Steven L.; Barney,Ward; Gharbian,Noel; Harvey,Douglas G.; Mclonis,Mark R.; Peara,Christopher D.; Pool,Scott L.; Sacca,Giuseppe; Sakaguchi,Thomas R.; Sandberg,Sharilyn J.; Walter,William V.; Wu,, Flexible multi-compartment container with peelable seals and method for making same.
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Barney Ward W. ; Smith Steven L., Flexible multiple compartment medical container with preferentially rupturable seals.
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Davis John S. (New Hope PA), Flexible package with easy opening peel seal.
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Yanidis Apostol (Berkeley CA), Flexible packaging material containing an antioxidant.
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Barney Ward W. ; Gharibian Noel ; Harvey Douglas G. ; McLonis Mark R. ; Peara Christopher D. ; Sacca Giuseppe ; Sandberg Sharilyn J. ; Smith Steven L. ; Walter William V. ; Wu Nicholas Chung-Hui ; Yo, Flexible, multiple-compartment drug container and method of making and using same.
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Barnett Roger ; Greenland Steven Jeffrey, Fluid sampler pouch with internal supportive structure.
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Heiremans Robert (Mariakerke BEX) Jacobs Roland (Wetteren BEX) D\Hondt Marc (Nazareth BEX), Heat sealable packaging film producing a peelable seal.
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Bonis Laszlo J. (Swampscott MA), Heat-sealable sheet and container.
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Moehlenbrock, Andrew W.; Karam, Debra C.; Wilson, Douglas; Stephens, Chad, Laminated lidstock.
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Barney Ward W. ; York Walter A. ; Harvey Douglas G. ; McLonis Mark R. ; Young H. Theodore ; Pool Scott L. ; Sacca Giuseppe ; Sandberg Sharilyn J. ; Sakaguchi Thomas R. ; Smith Steven L. ; Walter Will, Method of making and using a flexible, multiple-compartment drug container.
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Greenland Steven J., Method of producing zone specific peelable heat seals for flexible packaging applications.
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Sugimoto Keiji (Chiba JPX) Hayashi Takeo (Chiba JPX) Fujimoto Masahiro (Chiba JPX), Multi-layer film and package.
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Canamero Ernest V. (Durand IL), Package having tearstrip opener.
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Kato Takeo (Ohmiya JPX) Fukuda Nobuyoshi (Tokyo JPX), Packing materials for molten contents.
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Jeffrey Scott Beer, Peel seal blend of 1-polybutylene, m-LLDPE and LDPE with high hot tack.
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Raines Charles D. (Columbus GA), Pellable seal package.
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Yoshida Takao (Tama JPX) Suzuki Tatsuo (Machida JPX), Plastic container having an easy-to-peel seal forming compartments.
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Bunch Joseph A. ; Bunch Volney M., Process for manufacturing laminated wrapping paper.
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Jansen, Christopher Rene, Radial filtration vent and medical device packaging.
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Berich, Edward Alan, Reclosable storage bag closure with internal valving.
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Berich,Edward Alan, Reclosable storage bag closure with internal valving.
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York Walter A. ; Harvey Douglas G. ; Young H. Theodore ; Pool Scott L. ; Sacca Giuseppe ; Gharibian Noel, Sacrificial port for filling flexible, multiple-compartment drug container.
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Barney Ward W. ; York Walter A. ; Harvey Douglas G. ; Young H. Theodore ; Pool Scott L. ; Sacca Giuseppe ; Sakaguchi Thomas R. ; Smith Steven L. ; Gharibian Noel, Transport and sterilization carrier for flexible, multiple compartment drug container.
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Berger Kenneth R. (Grapevine TX), Ultrasonically-sealable peelable seal.
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Gutkowski Ronald R. (Racine County WI) Martens Edward J. (Racine County WI), Vapor-dispensing device.
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[미국특허] Packages embodying a controlled peel seal and method of preparing same 원문보기